[pygi] Fix passing GDestroyNotify

[Tomeu Vizoso <tomeuv src gnome org>]

commit 3e61e7d4450a2bb133c7f3862e0962a35339ce8d
Author: Tomeu Vizoso <tomeu sugarlabs org>
Date:   Mon May 3 18:35:13 2010 +0200

    Fix passing GDestroyNotify
    
    https://bugzilla.gnome.org/show_bug.cgi?id=617542

 gi/pygi-invoke.c         |    3 ++-
 tests/test_everything.py |   10 ++++++++++
 2 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/gi/pygi-invoke.c b/gi/pygi-invoke.c
index 431e0fe..aa8c5f3 100644
--- a/gi/pygi-invoke.c
+++ b/gi/pygi-invoke.c
@@ -391,7 +391,8 @@ _prepare_invocation_state (struct invocation_state *state,
                 py_args_pos++;
                 continue;
             } else if (i == state->destroy_notify_index) {
-                state->args[i]->v_pointer = _pygi_destroy_notify_create();
+                PyGICClosure *destroy_notify = _pygi_destroy_notify_create();
+                state->args[i]->v_pointer = destroy_notify->closure;
                 continue;
             }
             
diff --git a/tests/test_everything.py b/tests/test_everything.py
index 32ce389..de016e9 100644
--- a/tests/test_everything.py
+++ b/tests/test_everything.py
@@ -172,3 +172,13 @@ class TestCallbacks(unittest.TestCase):
         TestCallbacks.main_loop.run()
 
         self.assertTrue(TestCallbacks.called)
+
+    def testCallbackDestroyNotify(self):
+        def callback(user_data):
+            TestCallbacks.called = True
+            return 42
+
+        TestCallbacks.called = False
+        self.assertEquals(Everything.test_callback_destroy_notify(callback, 42), 42)
+        self.assertTrue(TestCallbacks.called)
+        self.assertEquals(Everything.test_callback_thaw_notifications(), 42)